Question -
A mat in the shape of a parallelogram has a height of 4 cm and a base of 3 cm. How much would it cost to cover a parallelogram shaped hall with an area of 180 sq. cm with mats, if each mat costs Rs.7?
Options:
A .  Rs. 105
B .  Rs. 115
C .  Rs. 135
D .  Rs. 95
Answer: Option A : A Let n be thenumber of mats required base of mat = 3 cm height of mat = 4 cm Area of the parallelogram= base ×height Area of hall = Area of mat × number of mats ⇒ 180 = 4 x 3 x n ⇒n=18012=15 Given that eachmat costs Rs. 7 Then the cost of 15 mats costs = 7 x 15 = Rs.105
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